I think it depends on how much business logic you have in your REST API layer. If you can get away with using a turnkey solution like hasura with the right acce

I think it depends on how much business logic you have in your REST API layer. If you can get away with using a turnkey solution like hasura with the right access control rules or by adding schema stitching then it would save a lot of effort. I think the best thing would be to try a turnkey solution for your appliaction's database and then evaluating the effort saved. Turnkey solutions also might end up partial effort if not all. For example, Hasura is a great fit for incrementally adding read-only GraphQL queries which is where a lot of benefit of GraphQL for the UI lies.